That cross is called the "Maltese Cross". It was registered as a trademark by Vacheron Constantin in 1880. It is said that the inspiration for this logo came from one of the cross-shaped parts in the movement.

The cross is called the "Maltese Cross". It was registered as a trademark by Vacheron Constantin in 1880. It is said that the inspiration for this logo came from one of the cross-shaped parts in the movement